Friction draft-rigging for railway-cars.



2 SHEETS-SHEET 1.

Patented 001;. 22, 1912.

J, F. OGONNOR.

NN. NN

FRIGTION DRAFT RIGGING POR RAILWAY GARS. APPLIQATION FILED JULY 24, 1911.

J, F. OCONNOR. EMOTION DRAFT RIGGING PoR RAILWAY CARS.

APPLICATION FILED JULY 24, 1911.

Patented Oct. 22, 1912.

2 SHEETS-SHEET 2.

Jgmf' UNITED sTATEs PATENT onmcn.

JOHN F. OCONNOR, OF C'H-ICAGO, ILLINOIS, ASSIGNOR T0 WILLIAM H. MINER, 0F

CHICAGO,

ILLINOIS.

FBICTION DRAlFT-RIGGING FOR RAILWAY-CARS.

Patented Oct. 22, A1912.

.1911. serial No. 640,077.

To all whom 'it mayf concern: Y

Be it known that I, JOHN F. OCoNNon,` a citizen ofthe United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Friction Draft-Rigging for Railway-Cars, of which the followingis a specification.

M-y invention relates to friction draft rigging for railway cars.

The object of my invention is to provide a friction draft rigging of a simple, strong, safe, efficient and durable construction, having in addition to the ordinary yoke, front and rear followers and friction shell, a tandem arranged set of wedge members and friction shoes so arranged that the action on the first set of friction shoes is transmitted to the second wedge, which in turn operates on the second setof friction shoes or blocks, Vand a spring located betweenthev wedge member to insure the return of the parts to their proper place after the buliing or pulling action ceases. K

My invention consists in the novel parts and devices and in-the novel combinations of parts and devices asherein shown, described and claimed. y

In the drawings -forming apart of this specification, Figure 1.l is-an elevation, partly i in longitudinal, vertical section, showing:- the structure embodying my4 invention. Flg, 2 is a plan view of theysamepartly in horizontal section. Fig. 3 is a, transverse sectiontaken substantially on the line 3`3of Fig. 1, looking in the direction of the arrows, but showing the frictionv shoesfend elevation insteady of in cross section.. Fig.-`4 1s a transverse section of thefr-lction. cylinder. and.- interlor mechanism,- taken on the line le-41. of Fig. 1', looking inthe direction terior view of one of the inner friction shoes or blocks.

gearing. These -center sills Aare provided with the usual front stops 1l and rear stops 12 against which the front and rear fol- -lowers 13 and 14, respectively, are adapted to' abut. l i

l5 Adenotes the draw-bar and 16 the draft yokerigidly attached thereto 'by means of rivetsl' 17.

The gearing is supported between the cenattached thereto by means of bolts 19.

.Mounted between the followers is the lon gitudinally movable cylindrical friction shell 20, openI at its front end, and provided with arear end 21, said end or face 21 being further provided on the interior of the shell with a stepped spring centering lug 22 for the draft spring 23 and the follower spring 25. The rear face 21'is provided with acountersink 26, and passinglthrough headed bolt 27,.havi ngatv one end thereof an adjustin nut 24 for maintaining the same within t e shell and adjusting the initial tension 'of the springs. This bolt` extends mounted thereonat its front endqthe front or outer wedge member 28. .This wedgememben 28' preferably consists ofa cylindrical outer portion; 29; 'three wedge or inclined faces`130, and anv inner 4bearing head 290.

and@ confined withinthe frictionA shell 20 are threefniction shoes or blocks31, havshell. andL each provided with an inner segwith the vcylindrical party29A of thewedge member 28. VTheseblocks 31 are furthermoreV providedv with inclined or wedging faces 33," coperati-ng with the friction faces 30 'of-f' the wedge vmember v'or block 28. On the inner ends ofgthe blocks 31 is a cylindrical.' portion 34, iniwhich is adapted to be pleedfthe restoring spring 35. This spring ter sills by means of a saddle 18 removablythe lug 22 is a longitudinally extending nearly tothe front follower and-has slidablyl Loesely i surrounding* this wedge memben 28,

ingexterior faces flitting the interior of' the,

menlial cylindrlcall portion 32, coperating` In. the drawings 10, 10 represent the cen: .ter sills between which is mounted the draft 35 is mounted on the rod Q7 and abuts against the inner end or bearing head 290 of' the wedge member QS and the front end of the inner wedge member 36. This inner wedge member 36 is somewhat similar iny construction to the outer wedge member QS, having the cylindrical portion 37 and the inclined or wedging friction faces 38'corresponding respectively to the faces 29 and 30 of the front wedge member. lioo-sely surrounding this inner wedge member 36 are three friction shoes 39, loosely `fitting within the shell 20 and having inner inclined or Wedging faces 40, cooperating with the inclined faces 38 of the inner wedge member 36. On the inner end of each ofthese friction blocks 39 is a short cylindrical portion il within which is adapted to rest the end of the spring 25 also mounted on the rod 27, and abutting at its inner end against the projection 22 formed. on theend of the friction shell 20. The friction shell isl maintained in its proper position within the yoke 16 by means of projections 4t2, as more clearly shown in Fig. 5. Applicant, by the use of a restoring spring 35, located between l the Wedges 28-and 36, insures the positive return of the Wedges and friction shoes to their proper Vposition upon removal -of the bulting or'pulling action, and thus accomplishes a result which has been lacking 'in prior devices embodying a somewhat similar construction. ,y

In operation, th'e wedge 2S irst compresses the spring 35, which is of largecapacity, and there is thus provided an initial resistance. Upon a continuation of the buffing or pulling action the shoes 314 are pressed. into engagement with the shell and by their inward movement engage the inner wedge 36 which in turn operates the friction shoes 39.

In the arrangement shown, applicant, by the use of one spring only, is able to'more than double its effectiveness in resisting the movement ofthe inner set of shoes by the' wedges, a set of friction vshoes coacting with 'each of said wedges, all-arranged in. tandem within the frictionl shell, a 'draft sprlng, and

a restoring spring between the wedges, sub-l stantially as specified.

2. In a friction draft rigging, the comb1- nation withv a drawbar, draft yoke, center sills, stops and followers, of a longitudinally movable friction shell having an inwardly extending lug on one end thereof, a longitudinally disposed rrod extending within the .shell and having slidably mounted thereon near its opposite end two similarly arranged wedges, two sets of friction shoes having inclined internal ivedging faces cooperating y with said wedges and a spring on said rod between the .wedge members, substantially as specified.

S. In a friction draft rigging, the combi-v nationwith a drawbar, draft yoke, center sills, stops and fol-lowers, of a longitudinally movable friction shell," a draft springtherein, a set of vcircularly disposed inner friction shoes engaging said spring and each having inclined or wedging fates, a wedge interposed lbetween said shoes, 4an outer set of y friction shoes, the inner ends of which engage the outer end of the said wedge, said outer friction slices each having .inclined friction faces, a second wedge engaging 'the last named set of friction shoes, anda spring within the outer set of friction shoes, substantially as specified.

Ll. In Va friction draft rigging, the combination with a drawbar, draft yoke, center sills, stops and followers, of a friction shell movable longitudinally, a longitudinally eX` vtending rod arranged therein, springs surrounding said rod, two wedges and a set'of circularly arranged friction shoes co-acting -having facescoperating with the inclined faces of the blocks, and an inner spring bearving end, a second set of `friction blocks within the shell and each having inner inclined friction faces engaged by a second wedge, eachl of said second named friction shoes having an inner segmental cylindrical portion for the reception of the end of one 'of 'the draft springs, and a restoring spring engaging the bearing endof the outer wedge and the outer face ofthe `second named wedge, substantially as specified.

6. In a draft rigging, a yoke, front and rear followers, a longitudinally movable-cylindrical friction shell, two wedges arranged tandem within said shell and each slidably mounted on a rod extending vthroughout thel `length of the shell, a restoring spring on said rod between and engaging said wedges, outer friction sho'es surrounding the outer one of the wedges and engaging both wedges, inner friction shoes surrounding the inner one of faces linclined in the same direction and arranged intandem, a shock-absorbing spring, 10 anda restoring spring for releasing the friction shoes, substantially as specified.

the Wedges, and draft'sprngs, substantially as specified.

7. In a friction draft rigging, a longitudinally movable friction shell, a pair of Wedges, two sets of friction shoes, each set cooperating With one of the Wedges, the wedges and sets of'friction shoes having their corresponding coperating friction Witnesses g PEARL ABRAMS,

H. M. MUNDAY.

Copies-4 of this patent may be obtained for` ve cents each, byaddressing the Commissioner of Patentsv Washington, D. C. 

